Short answer: the EarFun Uboom L. It ranks #2 of 179 medium speakers by sound quality, rated 4.6/5, at $49.79; the Tronsmart Mirtune S100 ranks #97, rated 3.1/5, and costs $79.99, which makes this an easy call rather than a real tradeoff.
The EarFun Uboom L is the better-sounding, deeper-bass option. A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video. Its bass reaches about 56Hz before falling 10dB, against 64Hz for the Tronsmart Mirtune S100. At 1.4 lbs (650 g) it weighs much less than the Tronsmart Mirtune S100 at 3 lbs (1.36 kg). It supports AAC Bluetooth, which the Tronsmart Mirtune S100 lacks. The catch: It cannot produce real low-bass rumble or fill a large, noisy space, and the top end loses some detail.
The case for the Tronsmart Mirtune S100: A waterproof speaker with long battery life for outdoor and casual listening. Watch for: Bass is limited by its ~64Hz specification.
Buy the EarFun Uboom L. It is rated higher for sound quality than the Tronsmart Mirtune S100 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| EarFun Uboom L | Tronsmart Mirtune S100 | |
|---|---|---|
| Price | $49.79 after coupon UBOOMLWC | $79.99 |
| Ranked | #2 of 179 in Medium Size Portable Bluetooth Speakers | #97 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes (firmware >= 1.2.6) | Yes |
| Aux Input | Yes | Yes |
| Aux Latency | 216ms | - |
| Bass Extension (-10dB) | 56Hz | ~64Hz |
| Battery Life | 16 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (10 band, firmware >= 1.2.6) | Yes |
| IP Rating | IP67 | IPX7 |
| Bluetooth Latency | 400ms normal / 66ms low latency mode | - |
| Maximum SPL | 103dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | - |
| Power Bank | No | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Partially |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.4 lbs (650 g) | 3 lbs (1.36 kg) |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) | 9.1” x 3.5” x 3.9” (231 x 88 x 100 mm) |
| Drivers | 2x 55mm drivers + 2x passive radiators | 20W drivers |
| Amplifier Power | 28W | 50W |
| Digital Aux Input | No | No |
| Wi-Fi | - | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
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